mmc: bcm2835: Remove local_irq_{save,restore}() around k[un]map_atomic()

A long time ago the kmap_atomic API required a slot to be provided which
risked the possibility that other code might use the same slot at the
same time. Disabling interrupts prevented the possibility of an interrupt
handler doing that. However, that went away with
commit 3e4d3af501cc ("mm: stack based kmap_atomic()").

Unfortunately, that unnecessary pattern of code has been copied since
and persists in bcm2385.c.

Remove it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-5-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index 641ab4f..49acbfa 100644 (file)
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -1068,7 +1068,6 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
        }
 
        if (host->drain_words) {
-               unsigned long flags;
                void *page;
                u32 *buf;
 
@@ -1076,7 +1075,6 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
                        host->drain_page += host->drain_offset >> PAGE_SHIFT;
                        host->drain_offset &= ~PAGE_MASK;
                }
-               local_irq_save(flags);
                page = kmap_atomic(host->drain_page);
                buf = page + host->drain_offset;
 
@@ -1089,7 +1087,6 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
                }
 
                kunmap_atomic(page);
-               local_irq_restore(flags);
        }
 
        bcm2835_finish_data(host);