diff options
author | Arjan van de Ven <arjan@infradead.org> | 2006-03-28 01:00:21 -0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-21 15:04:08 -0700 |
commit | 2682d27c5884550857cd96231db5b22b3acced53 (patch) | |
tree | 94b19f6a04993352d8ce3f189366d9cd4969fb58 /drivers/usb/misc/sisusbvga/sisusb_con.c | |
parent | 7327413c745c2f8e8d4b92f76759821263b095c1 (diff) |
[PATCH] USB: convert the semaphores in the sisusb driver to mutexes
From: Arjan van de Ven <arjan@infradead.org>
Convert the semaphores-used-as-mutex to mutexes in the sisusb video driver;
this required manual checking due to the "return as locked" stuff in this
driver, but the ->lock semaphore is still used as mutex in the end.
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Cc: Thomas Winischhofer <winischhofer.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/misc/sisusbvga/sisusb_con.c')
-rw-r--r-- | drivers/usb/misc/sisusbvga/sisusb_con.c | 129 |
1 files changed, 65 insertions, 64 deletions
diff --git a/drivers/usb/misc/sisusbvga/sisusb_con.c b/drivers/usb/misc/sisusbvga/sisusb_con.c index be5c1a25ae2..092281c172a 100644 --- a/drivers/usb/misc/sisusbvga/sisusb_con.c +++ b/drivers/usb/misc/sisusbvga/sisusb_con.c @@ -48,6 +48,7 @@ */ #include <linux/config.h> +#include <linux/mutex.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/signal.h> @@ -102,7 +103,7 @@ static struct sisusb_usb_data *mysisusbs[MAX_NR_CONSOLES]; /* Forward declaration */ static const struct consw sisusb_con; -extern struct semaphore disconnect_sem; +extern struct mutex disconnect_mutex; static inline void sisusbcon_memsetw(u16 *s, u16 c, unsigned int count) @@ -194,11 +195,11 @@ sisusb_get_sisusb_lock_and_check(unsigned short console) if (!(sisusb = sisusb_get_sisusb(console))) return NULL; - down(&sisusb->lock); + mutex_lock(&sisusb->lock); if (!sisusb_sisusb_valid(sisusb) || !sisusb->havethisconsole[console]) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return NULL; } @@ -236,18 +237,18 @@ sisusbcon_init(struct vc_data *c, int init) * are set up/restored. */ - down(&disconnect_sem); + mutex_lock(&disconnect_mutex); if (!(sisusb = sisusb_get_sisusb(c->vc_num))) { - up(&disconnect_sem); + mutex_unlock(&disconnect_mutex); return; } - down(&sisusb->lock); + mutex_lock(&sisusb->lock); if (!sisusb_sisusb_valid(sisusb)) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); return; } @@ -284,9 +285,9 @@ sisusbcon_init(struct vc_data *c, int init) if (!*c->vc_uni_pagedir_loc) con_set_default_unimap(c); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&disconnect_mutex); if (init) { c->vc_cols = cols; @@ -306,14 +307,14 @@ sisusbcon_deinit(struct vc_data *c) * and others, ie not under our control. */ - down(&disconnect_sem); + mutex_lock(&disconnect_mutex); if (!(sisusb = sisusb_get_sisusb(c->vc_num))) { - up(&disconnect_sem); + mutex_unlock(&disconnect_mutex); return; } - down(&sisusb->lock); + mutex_lock(&sisusb->lock); /* Clear ourselves in mysisusbs */ mysisusbs[c->vc_num] = NULL; @@ -332,12 +333,12 @@ sisusbcon_deinit(struct vc_data *c) } } - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); /* decrement the usage count on our sisusb */ kref_put(&sisusb->kref, sisusb_delete); - up(&disconnect_sem); + mutex_unlock(&disconnect_mutex); } /* interface routine */ @@ -417,7 +418,7 @@ sisusbcon_putc(struct vc_data *c, int ch, int y, int x) #endif if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -425,7 +426,7 @@ sisusbcon_putc(struct vc_data *c, int ch, int y, int x) sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y), (u32)SISUSB_HADDR(x, y), 2, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } /* Interface routine */ @@ -453,14 +454,14 @@ sisusbcon_putcs(struct vc_data *c, const unsigned short *s, sisusbcon_writew(sisusbcon_readw(s++), dest++); if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(x, y), (u32)SISUSB_HADDR(x, y), count * 2, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } /* Interface routine */ @@ -504,7 +505,7 @@ sisusbcon_clear(struct vc_data *c, int y, int x, int height, int width) } if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -514,7 +515,7 @@ sisusbcon_clear(struct vc_data *c, int y, int x, int height, int width) sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(x, y), (u32)SISUSB_HADDR(x, y), length, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } /* Interface routine */ @@ -576,7 +577,7 @@ sisusbcon_bmove(struct vc_data *c, int sy, int sx, #endif if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -586,7 +587,7 @@ sisusbcon_bmove(struct vc_data *c, int sy, int sx, sisusb_copy_memory(sisusb, (unsigned char *)SISUSB_VADDR(dx, dy), (u32)SISUSB_HADDR(dx, dy), length, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } /* interface routine */ @@ -609,7 +610,7 @@ sisusbcon_switch(struct vc_data *c) /* Don't write to screen if in gfx mode */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -618,7 +619,7 @@ sisusbcon_switch(struct vc_data *c) * as origin. */ if (c->vc_origin == (unsigned long)c->vc_screenbuf) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); printk(KERN_DEBUG "sisusb: ASSERT ORIGIN != SCREENBUF!\n"); return 0; } @@ -635,7 +636,7 @@ sisusbcon_switch(struct vc_data *c) (u32)SISUSB_HADDR(0, 0), length, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -657,7 +658,7 @@ sisusbcon_save_screen(struct vc_data *c) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -669,7 +670,7 @@ sisusbcon_save_screen(struct vc_data *c) sisusbcon_memcpyw((u16 *)c->vc_screenbuf, (u16 *)c->vc_origin, length); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } /* interface routine */ @@ -690,7 +691,7 @@ sisusbcon_set_palette(struct vc_data *c, unsigned char *table) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return -EINVAL; } @@ -705,7 +706,7 @@ sisusbcon_set_palette(struct vc_data *c, unsigned char *table) break; } - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -728,7 +729,7 @@ sisusbcon_blank(struct vc_data *c, int blank, int mode_switch) sisusb->is_gfx = blank ? 1 : 0; if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -777,7 +778,7 @@ sisusbcon_blank(struct vc_data *c, int blank, int mode_switch) cr63 = 0x40; break; default: - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return -EINVAL; } @@ -788,7 +789,7 @@ sisusbcon_blank(struct vc_data *c, int blank, int mode_switch) } - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return ret; } @@ -809,7 +810,7 @@ sisusbcon_scrolldelta(struct vc_data *c, int lines) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -849,7 +850,7 @@ sisusbcon_scrolldelta(struct vc_data *c, int lines) sisusbcon_set_start_address(sisusb, c); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 1; } @@ -867,7 +868,7 @@ sisusbcon_cursor(struct vc_data *c, int mode) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -879,7 +880,7 @@ sisusbcon_cursor(struct vc_data *c, int mode) if (mode == CM_ERASE) { sisusb_setidxregor(sisusb, SISCR, 0x0a, 0x20); sisusb->sisusb_cursor_size_to = -1; - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return; } @@ -919,7 +920,7 @@ sisusbcon_cursor(struct vc_data *c, int mode) sisusb->sisusb_cursor_size_to = to; } - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); } static int @@ -961,7 +962,7 @@ sisusbcon_scroll_area(struct vc_data *c, struct sisusb_usb_data *sisusb, sisusb_copy_memory(sisusb, (char *)SISUSB_VADDR(0, t), (u32)SISUSB_HADDR(0, t), length, &written); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 1; } @@ -994,7 +995,7 @@ sisusbcon_scroll(struct vc_data *c, int t, int b, int dir, int lines) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb)) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -1084,7 +1085,7 @@ sisusbcon_scroll(struct vc_data *c, int t, int b, int dir, int lines) c->vc_pos = c->vc_pos - oldorigin + c->vc_origin; - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 1; } @@ -1106,7 +1107,7 @@ sisusbcon_set_origin(struct vc_data *c) /* sisusb->lock is down */ if (sisusb_is_inactive(c, sisusb) || sisusb->con_blanked) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -1116,7 +1117,7 @@ sisusbcon_set_origin(struct vc_data *c) sisusb->con_rolled_over = 0; - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 1; } @@ -1133,7 +1134,7 @@ sisusbcon_resize(struct vc_data *c, unsigned int newcols, unsigned int newrows) fh = sisusb->current_font_height; - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); /* We are quite unflexible as regards resizing. The vt code * handles sizes where the line length isn't equal the pitch @@ -1167,7 +1168,7 @@ sisusbcon_do_font_op(struct sisusb_usb_data *sisusb, int set, int slot, if ((slot != 0 && slot != 2) || !fh) { if (uplock) - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return -EINVAL; } @@ -1327,7 +1328,7 @@ sisusbcon_do_font_op(struct sisusb_usb_data *sisusb, int set, int slot, } if (uplock) - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); if (dorecalc && c) { int i, rows = c->vc_scan_lines / fh; @@ -1351,7 +1352,7 @@ sisusbcon_do_font_op(struct sisusb_usb_data *sisusb, int set, int slot, font_op_error: if (uplock) - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return -EIO; } @@ -1417,19 +1418,19 @@ sisusbcon_font_get(struct vc_data *c, struct console_font *font) font->charcount = 256; if (!font->data) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } if (!sisusb->font_backup) { - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return -ENODEV; } /* Copy 256 chars only, like vgacon */ memcpy(font->data, sisusb->font_backup, 256 * 32); - up(&sisusb->lock); + mutex_unlock(&sisusb->lock); return 0; } @@ -1512,14 +1513,14 @@ sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last) { int i, ret, minor = sisusb->minor; - down(&disconnect_sem); + mutex_lock(&disconnect_mutex); - down(&sisusb->lock); + mutex_lock(&sisusb->lock); /* Erm.. that should not happen */ if (sisusb->haveconsole || !sisusb->SiS_Pr) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); return 1; } @@ -1529,15 +1530,15 @@ sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last) if (first > last || first > MAX_NR_CONSOLES || last > MAX_NR_CONSOLES) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); return 1; } /* If gfxcore not initialized or no consoles given, quit graciously */ if (!sisusb->gfxinit || first < 1 || last < 1) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); return 0; } @@ -1547,8 +1548,8 @@ sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last) /* Set up text mode (and upload default font) */ if (sisusb_reset_text_mode(sisusb, 1)) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); printk(KERN_ERR "sisusbvga[%d]: Failed to set up text mode\n", minor); @@ -1571,16 +1572,16 @@ sisusb_console_init(struct sisusb_usb_data *sisusb, int first, int last) /* Allocate screen buffer */ if (!(sisusb->scrbuf = (unsigned long)vmalloc(sisusb->scrbuf_size))) { - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); printk(KERN_ERR "sisusbvga[%d]: Failed to allocate screen buffer\n", minor); return 1; } - up(&sisusb->lock); - up(&disconnect_sem); + mutex_unlock(&sisusb->lock); + mutex_unlock(&disconnect_mutex); /* Now grab the desired console(s) */ ret = take_over_console(&sisusb_con, first - 1, last - 1, 0); |