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authorJan Beulich <JBeulich@novell.com>2005-06-23 11:09:59 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 20:45:28 +0400
commitc7ea4b31fd962b4baadb42c0b8d7c6851c584102 (patch)
treebe097db5341cd09a4cf640a2bc3c5a189e989f0c /drivers/ide
parentef3daeda7b58f046f94b26637d500354038d39f4 (diff)
downloadlinux-c7ea4b31fd962b4baadb42c0b8d7c6851c584102.tar.xz
[PATCH] ide-floppy adjustments
Fix a build problem when IDEFLOPPY_DEBUG_BUGS is turned off, and eliminate an access to memory that is no longer allocated (causing systems to fail booting when CONFIG_DEBUG_PAGEALLOC is turned on). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-floppy.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index c949e98df4b6..9eab6426148e 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -661,10 +661,12 @@ static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, un
idefloppy_do_end_request(drive, 1, done >> 9);
+#if IDEFLOPPY_DEBUG_BUGS
if (bcount) {
printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
idefloppy_write_zeros(drive, bcount);
}
+#endif
}
static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
@@ -1048,6 +1050,9 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
atapi_bcount_t bcount;
ide_handler_t *pkt_xfer_routine;
+#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone
+ and have lived on another thread's stack; that stack may have become
+ unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */
#if IDEFLOPPY_DEBUG_BUGS
if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD &&
pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
@@ -1055,6 +1060,7 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
"Two request sense in serial were issued\n");
}
#endif /* IDEFLOPPY_DEBUG_BUGS */
+#endif
if (floppy->failed_pc == NULL &&
pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)