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authorDavid Vrabel <david.vrabel@csr.com>2009-10-07 16:32:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-10-08 07:36:40 -0700
commita1125b1e41228bc2e5b4f023004a4280282d1dab (patch)
treedae42956998db0946abec9163468d37466af92e5
parenta54fed9f70a2765f4476e1ce3d691a2f31df258f (diff)
mmc: sdio: don't require CISTPL_VERS_1 to contain 4 strings
The PC Card 8.0 specification (vol. 4, section 3.2.10) says the TPLLV1_INFO field of the CISTPL_VERS_1 tuple must contain 4 strings. Some cards don't have all 4 so just parse as many as we can. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Vrabel <david.vrabel@csr.com> Tested-by: Jonathan Cameron <jic23@cam.ac.uk> Tested-by: Bing Zhao <bzhao@marvell.com> Cc: Roel Kluin <roel.kluin@gmail.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/mmc/core/sdio_cis.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
index e1035c89580..f85dcd53650 100644
--- a/drivers/mmc/core/sdio_cis.c
+++ b/drivers/mmc/core/sdio_cis.c
@@ -29,6 +29,8 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
unsigned i, nr_strings;
char **buffer, *string;
+ /* Find all null-terminated (including zero length) strings in
+ the TPLLV1_INFO field. Trailing garbage is ignored. */
buf += 2;
size -= 2;
@@ -39,11 +41,8 @@ static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
if (buf[i] == 0)
nr_strings++;
}
-
- if (nr_strings < 4) {
- printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n");
+ if (nr_strings == 0)
return 0;
- }
size = i;