From: Rolf Evers-Fischer <embedded24@evers-fischer.de> To: ysato@users.sourceforge.jp, dalias@libc.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Rolf Evers-Fischer <embedded24@evers-fischer.de> Subject: [PATCH] sh: dma: Add missing IS_ERR test Date: Fri, 07 Jun 2019 11:54:03 +0000 [thread overview] Message-ID: <20190607115404.4557-1-embedded24@evers-fischer.de> (raw) get_dma_channel may return ERR_PTR, so a check is added. Signed-off-by: Rolf Evers-Fischer <embedded24@evers-fischer.de> --- arch/sh/drivers/dma/dma-api.c | 20 +++++++++++++++++++- arch/sh/drivers/dma/dma-sysfs.c | 2 +- 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c index ab9170494dcc..5d6f1a46cc5e 100644 --- a/arch/sh/drivers/dma/dma-api.c +++ b/arch/sh/drivers/dma/dma-api.c @@ -94,7 +94,7 @@ int get_dma_residue(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); - if (info->ops->get_residue) + if (!IS_ERR(channel) && (info->ops->get_residue)) return info->ops->get_residue(channel); return 0; @@ -195,6 +195,9 @@ int request_dma(unsigned int chan, const char *dev_id) int result; channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + if (atomic_xchg(&channel->busy, 1)) return -EBUSY; @@ -217,6 +220,9 @@ void free_dma(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (info->ops->free) info->ops->free(channel); @@ -229,6 +235,9 @@ void dma_wait_for_completion(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (channel->flags & DMA_TEI_CAPABLE) { wait_event(channel->wait_queue, (info->ops->get_residue(channel) = 0)); @@ -274,6 +283,9 @@ void dma_configure_channel(unsigned int chan, unsigned long flags) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (info->ops->configure) info->ops->configure(channel, flags); } @@ -285,6 +297,9 @@ int dma_xfer(unsigned int chan, unsigned long from, struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + channel->sar = from; channel->dar = to; channel->count = size; @@ -299,6 +314,9 @@ int dma_extend(unsigned int chan, unsigned long op, void *param) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + if (info->ops->extend) return info->ops->extend(channel, op, param); diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c index 8ef318150f84..6ba5b569d446 100644 --- a/arch/sh/drivers/dma/dma-sysfs.c +++ b/arch/sh/drivers/dma/dma-sysfs.c @@ -30,7 +30,7 @@ static ssize_t dma_show_devices(struct device *dev, struct dma_info *info = get_dma_info(i); struct dma_channel *channel = get_dma_channel(i); - if (unlikely(!info) || !channel) + if (unlikely(!info) || IS_ERR_OR_NULL(channel)) continue; len += sprintf(buf + len, "%2d: %14s %s\n", -- 2.21.0
WARNING: multiple messages have this Message-ID (diff)
From: Rolf Evers-Fischer <embedded24@evers-fischer.de> To: ysato@users.sourceforge.jp, dalias@libc.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Rolf Evers-Fischer <embedded24@evers-fischer.de> Subject: [PATCH] sh: dma: Add missing IS_ERR test Date: Fri, 7 Jun 2019 13:54:03 +0200 [thread overview] Message-ID: <20190607115404.4557-1-embedded24@evers-fischer.de> (raw) get_dma_channel may return ERR_PTR, so a check is added. Signed-off-by: Rolf Evers-Fischer <embedded24@evers-fischer.de> --- arch/sh/drivers/dma/dma-api.c | 20 +++++++++++++++++++- arch/sh/drivers/dma/dma-sysfs.c | 2 +- 2 files changed, 20 insertions(+), 2 deletions(-) diff --git a/arch/sh/drivers/dma/dma-api.c b/arch/sh/drivers/dma/dma-api.c index ab9170494dcc..5d6f1a46cc5e 100644 --- a/arch/sh/drivers/dma/dma-api.c +++ b/arch/sh/drivers/dma/dma-api.c @@ -94,7 +94,7 @@ int get_dma_residue(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); - if (info->ops->get_residue) + if (!IS_ERR(channel) && (info->ops->get_residue)) return info->ops->get_residue(channel); return 0; @@ -195,6 +195,9 @@ int request_dma(unsigned int chan, const char *dev_id) int result; channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + if (atomic_xchg(&channel->busy, 1)) return -EBUSY; @@ -217,6 +220,9 @@ void free_dma(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (info->ops->free) info->ops->free(channel); @@ -229,6 +235,9 @@ void dma_wait_for_completion(unsigned int chan) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (channel->flags & DMA_TEI_CAPABLE) { wait_event(channel->wait_queue, (info->ops->get_residue(channel) == 0)); @@ -274,6 +283,9 @@ void dma_configure_channel(unsigned int chan, unsigned long flags) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return; + if (info->ops->configure) info->ops->configure(channel, flags); } @@ -285,6 +297,9 @@ int dma_xfer(unsigned int chan, unsigned long from, struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + channel->sar = from; channel->dar = to; channel->count = size; @@ -299,6 +314,9 @@ int dma_extend(unsigned int chan, unsigned long op, void *param) struct dma_info *info = get_dma_info(chan); struct dma_channel *channel = get_dma_channel(chan); + if (IS_ERR(channel)) + return PTR_ERR(channel); + if (info->ops->extend) return info->ops->extend(channel, op, param); diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c index 8ef318150f84..6ba5b569d446 100644 --- a/arch/sh/drivers/dma/dma-sysfs.c +++ b/arch/sh/drivers/dma/dma-sysfs.c @@ -30,7 +30,7 @@ static ssize_t dma_show_devices(struct device *dev, struct dma_info *info = get_dma_info(i); struct dma_channel *channel = get_dma_channel(i); - if (unlikely(!info) || !channel) + if (unlikely(!info) || IS_ERR_OR_NULL(channel)) continue; len += sprintf(buf + len, "%2d: %14s %s\n", -- 2.21.0
next reply other threads:[~2019-06-07 11:54 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-06-07 11:54 Rolf Evers-Fischer [this message] 2019-06-07 11:54 ` [PATCH] sh: dma: Add missing IS_ERR test Rolf Evers-Fischer 2019-06-08 8:27 ` Sergei Shtylyov 2019-06-08 8:27 ` Sergei Shtylyov 2019-06-11 10:00 ` Rolf Evers-Fischer 2019-06-11 10:00 ` Rolf Evers-Fischer 2019-06-08 12:26 ` Geert Uytterhoeven 2019-06-08 12:26 ` Geert Uytterhoeven 2019-06-11 10:20 ` Rolf Evers-Fischer 2019-06-11 10:20 ` Rolf Evers-Fischer
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