mmc: tmio_mmc: do not enable card hotplug interrupts, if unused

If TMIO MMC is used in polling mode, or the card is non-removable, or
card-detection is performed, using an external interrupt, there is no
need to enable controller native card hotplug interrupts.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index e21988901c3..5444d533322 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -304,6 +304,7 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 {
         struct mmc_data *data = host->data;
         int c = cmd->opcode;
+        u32 irq_mask = TMIO_MASK_CMD;
 
         /* Command 12 is handled by hardware */
         if (cmd->opcode == 12 && !cmd->arg) {
@@ -339,7 +340,9 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
                         c |= TRANSFER_READ;
         }
 
-        tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_CMD);
+        if (!host->native_hotplug)
+                irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
+        tmio_mmc_enable_mmc_irqs(host, irq_mask);
 
         /* Fire off the command */
         sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
@@ -963,6 +966,8 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
                 irq_mask |= TMIO_MASK_READOP;
         if (!_host->chan_tx)
                 irq_mask |= TMIO_MASK_WRITEOP;
+        if (!_host->native_hotplug)
+                irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
 
         tmio_mmc_enable_mmc_irqs(_host, irq_mask);