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mmc: wbsd: Replace kmap_atomic() with kmap_local_page()

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kmap_local_page() is equivalent to kmap_atomic() except that it does not
disable page faults or preemption. Where possible kmap_local_page() is
preferred to kmap_atomic() - refer kernel highmem documentation.

In this case, there is no need to disable page faults or preemption, so
replace kmap_atomic() with kmap_local_page(), and, correspondingly,
kunmap_atomic() with kunmap_local().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-15-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2022-10-05 13:19:51 +03:00 committed by Ulf Hansson
parent 2fc458f75e
commit cdb1ad5270
1 changed files with 5 additions and 5 deletions
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10
drivers/mmc/host/wbsd.c
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@ -267,7 +267,7 @@ static inline int wbsd_next_sg(struct wbsd_host *host)
static inline char *wbsd_map_sg(struct wbsd_host *host)
{
return kmap_atomic(sg_page(host->cur_sg)) + host->cur_sg->offset;
return kmap_local_page(sg_page(host->cur_sg)) + host->cur_sg->offset;
}
static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data)
@ -439,7 +439,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host)
* End of scatter list entry?
*/
if (host->remain == 0) {
kunmap_atomic(buffer);
kunmap_local(buffer);
/*
* Get next entry. Check if last.
*/
@ -451,7 +451,7 @@ static void wbsd_empty_fifo(struct wbsd_host *host)
}
}
}
kunmap_atomic(buffer);
kunmap_local(buffer);
/*
* This is a very dirty hack to solve a
@ -505,7 +505,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host)
* End of scatter list entry?
*/
if (host->remain == 0) {
kunmap_atomic(buffer);
kunmap_local(buffer);
/*
* Get next entry. Check if last.
*/
@ -517,7 +517,7 @@ static void wbsd_fill_fifo(struct wbsd_host *host)
}
}
}
kunmap_atomic(buffer);
kunmap_local(buffer);
/*
* The controller stops sending interrupts for