[PATCH] tmio_mmc: fix misuse of kunmap_atomic() in tmio_mmc.c

[Eric Miao]

According to commit 597781f3e51f48ef8e67be772196d9e9673752c4

    kmap_atomic: make kunmap_atomic() harder to misuse

kunmap_atomic() takes a pointer to within the page, instead of a pointer
to 'struct page'.  So tmio_mmc_kunmap_atomic() should really take the
pointer what tmio_mmc_kmap_atomic() returns.

Cc: Ian Molton <spyro at f2s.com>
Cc: Magnus Damm <damm at opensource.se>
Signed-off-by: Eric Miao <eric.y.miao at gmail.com>
---
 drivers/mmc/host/tmio_mmc.c |    2 +-
 drivers/mmc/host/tmio_mmc.h |    5 ++---
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index ee7d0a5..24b9c3e 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -191,7 +191,7 @@ static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
 
 	host->sg_off += count;
 
-	tmio_mmc_kunmap_atomic(host, &flags);
+	tmio_mmc_kunmap_atomic(buf, &flags);
 
 	if (host->sg_off == host->sg_ptr->length)
 		tmio_mmc_next_sg(host);
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 64f7d5d..8f308b9 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -186,10 +186,9 @@ static inline char *tmio_mmc_kmap_atomic(struct tmio_mmc_host *host,
 	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
 }
 
-static inline void tmio_mmc_kunmap_atomic(struct tmio_mmc_host *host,
-	unsigned long *flags)
+static inline void tmio_mmc_kunmap_atomic(void *buf, unsigned long *flags)
 {
-	kunmap_atomic(sg_page(host->sg_ptr), KM_BIO_SRC_IRQ);
+	kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 	local_irq_restore(*flags);
 }
 
-- 
1.7.0.4