linux-kernel - [PATCH v2 18/22] mmc: tmio: remove useless TMIO_MASK_CMD handling in tmio_mmc_host

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Date:   Sat, 25 Nov 2017 01:24:53 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-mmc@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     Simon Horman <simon.horman@...ronome.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-renesas-soc@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH v2 18/22] mmc: tmio: remove useless TMIO_MASK_CMD handling in tmio_mmc_host_probe()

TMIO_MASK_CMD is properly enabled in tmio_mmc_start_command().

We have no reason to set it up in tmio_mmc_host_probe().  (If we
really wanted to set it in the probe, we would have to do likewise
when resuming.)

Even worse, the following code is extremely confusing:

  _host->sdcard_irq_mask &= ~irq_mask;

The logic is opposite between "->sdcard_irq_mask" and "irq_mask".
The intention is not clear at a glance.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

Changes in v2:
  - Newly added

 drivers/mmc/host/tmio_mmc_core.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 345e379..f5b11b8 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1194,7 +1194,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	struct mmc_host *mmc = _host->mmc;
 	struct resource *res_ctl;
 	int ret;
-	u32 irq_mask = TMIO_MASK_CMD;
 
 	tmio_mmc_of_parse(pdev, pdata);
 
@@ -1289,8 +1288,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
 	tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
 
-	_host->sdcard_irq_mask &= ~irq_mask;
-
 	if (_host->native_hotplug)
 		tmio_mmc_enable_mmc_irqs(_host,
 				TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
-- 
2.7.4