mmc: sdhci: Remove local_irq_{save,restore}() around sg_miter_{next,stop}()

sg_miter_next() using an sg_mapping_iter with flag SG_MITER_ATOMIC uses
kmap_atomic() to map pages.

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 3e4d3af5 ("mm: stack based kmap_atomic()").

Remove local_irq_{save,restore}() around sg_miter_{next,stop}().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-3-adrian.hunter@intel.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci.c

@@ -526,7 +526,6 @@ static inline bool sdhci_has_requests(struct sdhci_host *host)
 
 static void sdhci_read_block_pio(struct sdhci_host *host)
 {
-	unsigned long flags;
 	size_t blksize, len, chunk;
 	u32 scratch;
 	u8 *buf;
@@ -536,8 +535,6 @@ static void sdhci_read_block_pio(struct sdhci_host *host)
 	blksize = host->data->blksz;
 	chunk = 0;
 
-	local_irq_save(flags);
-
 	while (blksize) {
 		BUG_ON(!sg_miter_next(&host->sg_miter));
 
@@ -564,13 +561,10 @@ static void sdhci_read_block_pio(struct sdhci_host *host)
 	}
 
 	sg_miter_stop(&host->sg_miter);
-
-	local_irq_restore(flags);
 }
 
 static void sdhci_write_block_pio(struct sdhci_host *host)
 {
-	unsigned long flags;
 	size_t blksize, len, chunk;
 	u32 scratch;
 	u8 *buf;
@@ -581,8 +575,6 @@ static void sdhci_write_block_pio(struct sdhci_host *host)
 	chunk = 0;
 	scratch = 0;
 
-	local_irq_save(flags);
-
 	while (blksize) {
 		BUG_ON(!sg_miter_next(&host->sg_miter));
 
@@ -609,8 +601,6 @@ static void sdhci_write_block_pio(struct sdhci_host *host)
 	}
 
 	sg_miter_stop(&host->sg_miter);
-
-	local_irq_restore(flags);
 }
 
 static void sdhci_transfer_pio(struct sdhci_host *host)