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| author | Adrian Hunter <adrian.hunter@nokia.com> | 2009-09-23 01:44:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 16:39:35 +0200 |
| commit | 4dffd7a251172d78a157ff45ec1207012f44774a (patch) | |
| tree | 35db86950a7c43ba4b69dc64220c57d10e15f693 /lib/gcd.c | |
| parent | omap_hsmmc: cater for weird CMD6 behaviour (diff) | |
| download | linux-4dffd7a251172d78a157ff45ec1207012f44774a.tar.xz linux-4dffd7a251172d78a157ff45ec1207012f44774a.zip | |
omap_hsmmc: prevent races with irq handler
If an unexpected interrupt occurs while preparing the next request, an
oops can occur.
For example, a new request is setting up DMA for data transfer so
host->data is not NULL. An unexpected transfer complete (TC) interrupt
comes along and the interrupt handler sets host->data to NULL. Oops!
Prevent that by adding a spinlock.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.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>
Diffstat (limited to 'lib/gcd.c')
0 files changed, 0 insertions, 0 deletions