linux-kernel - [PATCH v2 04/11] mmc: core: Move code to get pending SDIO IRQs to a function

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Date:   Sun,  8 Sep 2019 12:12:29 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     linux-mmc@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Douglas Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>
Cc:     Shawn Lin <shawn.lin@...k-chips.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Yong Mao <yong.mao@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 04/11] mmc: core: Move code to get pending SDIO IRQs to a function

From: Matthias Kaehlcke <mka@...omium.org>

To improve code quality, let's move the code that gets pending SDIO IRQs
from process_sdio_pending_irqs() into a dedicated function.

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
[Ulf: Converted function into static]
Tested-by: Matthias Kaehlcke <mka@...omium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 drivers/mmc/core/sdio_irq.c | 46 ++++++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 16 deletions(-)

diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index 0bcc5e83bd1a..f75043266984 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -27,6 +27,34 @@
 #include "core.h"
 #include "card.h"
 
+static int sdio_get_pending_irqs(struct mmc_host *host, u8 *pending)
+{
+	struct mmc_card *card = host->card;
+	int ret;
+
+	WARN_ON(!host->claimed);
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, pending);
+	if (ret) {
+		pr_debug("%s: error %d reading SDIO_CCCR_INTx\n",
+		       mmc_card_id(card), ret);
+		return ret;
+	}
+
+	if (*pending && mmc_card_broken_irq_polling(card) &&
+	    !(host->caps & MMC_CAP_SDIO_IRQ)) {
+		unsigned char dummy;
+
+		/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
+		 * register with a Marvell SD8797 card. A dummy CMD52 read to
+		 * function 0 register 0xff can avoid this.
+		 */
+		mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
+	}
+
+	return 0;
+}
+
 static int process_sdio_pending_irqs(struct mmc_host *host)
 {
 	struct mmc_card *card = host->card;
@@ -49,23 +77,9 @@ static int process_sdio_pending_irqs(struct mmc_host *host)
 		return 1;
 	}
 
-	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
-	if (ret) {
-		pr_debug("%s: error %d reading SDIO_CCCR_INTx\n",
-		       mmc_card_id(card), ret);
+	ret = sdio_get_pending_irqs(host, &pending);
+	if (ret)
 		return ret;
-	}
-
-	if (pending && mmc_card_broken_irq_polling(card) &&
-	    !(host->caps & MMC_CAP_SDIO_IRQ)) {
-		unsigned char dummy;
-
-		/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
-		 * register with a Marvell SD8797 card. A dummy CMD52 read to
-		 * function 0 register 0xff can avoid this.
-		 */
-		mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
-	}
 
 	count = 0;
 	for (i = 1; i <= 7; i++) {
-- 
2.17.1