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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	linux-gpio@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Serge Semin <fancer.lancer@gmail.com>
Subject: [PATCH v2 10/14] gpio: dwapb: Drop bogus BUG_ON()s
Date: Wed, 15 Apr 2020 17:15:30 +0300	[thread overview]
Message-ID: <20200415141534.31240-11-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20200415141534.31240-1-andriy.shevchenko@linux.intel.com>

There is no case when no context is provided in the ->suspend() and
->resume() hooks. Moreover, BUG_ON() is harmful to user and makes kernel
inoperable after the crash. Drop the BUG_ON()s for good.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
---
 drivers/gpio/gpio-dwapb.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 0b073cbc003b..ae4c4db8b156 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -723,8 +723,6 @@ static int dwapb_gpio_suspend(struct device *dev)
 		unsigned int idx = gpio->ports[i].idx;
 		struct dwapb_context *ctx = gpio->ports[i].ctx;
 
-		BUG_ON(!ctx);
-
 		offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_STRIDE;
 		ctx->dir = dwapb_read(gpio, offset);
 
@@ -773,8 +771,6 @@ static int dwapb_gpio_resume(struct device *dev)
 		unsigned int idx = gpio->ports[i].idx;
 		struct dwapb_context *ctx = gpio->ports[i].ctx;
 
-		BUG_ON(!ctx);
-
 		offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_STRIDE;
 		dwapb_write(gpio, offset, ctx->data);
 
-- 
2.25.1


  parent reply	other threads:[~2020-04-15 14:16 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-15 14:15 [PATCH v2 00/14] gpio: dwapb: Clean up the driver and a fix Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 01/14] gpio: dwapb: Append MODULE_ALIAS for platform driver Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 02/14] gpio: dwapb: Refactor IRQ handler to use bit operations Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 03/14] gpio: dwapb: Use chained IRQ prologue and epilogue Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 04/14] gpio: dwapb: set default handler to be handle_bad_irq() Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 05/14] gpio: dwapb: Deduplicate IRQ resource management Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 06/14] gpio: dwapb: Convert to use irqd_to_hwirq() Andy Shevchenko
2020-04-15 15:18   ` Serge Semin
2020-04-15 14:15 ` [PATCH v2 07/14] gpio: dwapb: Use device_get_match_data() to simplify code Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 08/14] gpio: dwapb: Convert to use IRQ core provided macros Andy Shevchenko
2020-04-15 17:53   ` Serge Semin
2020-04-16 10:39     ` Andy Shevchenko
2020-04-16 11:01       ` Serge Semin
2020-04-16 12:00         ` Jan Kiszka
2020-04-15 14:15 ` [PATCH v2 09/14] gpio: dwapb: Switch to more usual pattern of RMW in dwapb_gpio_set_debounce() Andy Shevchenko
2020-04-15 14:15 ` Andy Shevchenko [this message]
2020-04-15 14:15 ` [PATCH v2 11/14] gpio: dwapb: Drop of_match_ptr() & ACPI_PTR() calls Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 12/14] gpio: dwapb: Split out dwapb_get_irq() helper Andy Shevchenko
2020-04-15 14:15 ` [PATCH v2 13/14] gpio: dwapb: Use positive conditional in dwapb_configure_irqs() Andy Shevchenko
2020-04-15 16:37   ` Serge Semin
2020-04-16 11:53     ` Linus Walleij
2020-04-16 13:48       ` Serge Semin
2020-04-17 10:42         ` Linus Walleij
2020-04-17 12:56           ` Andy Shevchenko
2020-04-17 20:53           ` Serge Semin
2020-04-15 14:15 ` [PATCH v2 14/14] gpio: dwapb: Amend indentation in some cases Andy Shevchenko
2020-04-15 17:15   ` Serge Semin
2020-04-16 10:56     ` Andy Shevchenko
2020-04-16 11:06       ` Serge Semin
2020-04-16 12:14         ` Linus Walleij
2020-04-16 13:37           ` Serge Semin
2020-04-16 13:59             ` Linus Walleij
2020-04-16 14:09             ` Andy Shevchenko
2020-04-16  7:26 ` [PATCH v2 00/14] gpio: dwapb: Clean up the driver and a fix Linus Walleij

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