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From: Ian Abbott <abbotti@mev.co.uk>
To: devel@driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Ian Abbott <abbotti@mev.co.uk>,
	H Hartley Sweeten <hsweeten@visionengravers.com>,
	stable@vger.kernel.org
Subject: [PATCH 05/14] staging: comedi: das800: Fix endian problem for AI command data
Date: Tue, 23 Feb 2021 14:30:46 +0000	[thread overview]
Message-ID: <20210223143055.257402-6-abbotti@mev.co.uk> (raw)
In-Reply-To: <20210223143055.257402-1-abbotti@mev.co.uk>

The analog input subdevice supports Comedi asynchronous commands that
use Comedi's 16-bit sample format.  However, the call to
`comedi_buf_write_samples()` is passing the address of a 32-bit integer
variable.  On bigendian machines, this will copy 2 bytes from the wrong
end of the 32-bit value.  Fix it by changing the type of the variable
holding the sample value to `unsigned short`.

Fixes: ad9eb43c93d8 ("staging: comedi: das800: use comedi_buf_write_samples()"
Cc: <stable@vger.kernel.org> # 3.19+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---
 drivers/staging/comedi/drivers/das800.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c
index 4ea100ff6930..2881808d6606 100644
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -427,7 +427,7 @@ static irqreturn_t das800_interrupt(int irq, void *d)
 	struct comedi_cmd *cmd;
 	unsigned long irq_flags;
 	unsigned int status;
-	unsigned int val;
+	unsigned short val;
 	bool fifo_empty;
 	bool fifo_overflow;
 	int i;
-- 
2.30.0


WARNING: multiple messages have this Message-ID (diff)
From: Ian Abbott <abbotti@mev.co.uk>
To: devel@driverdev.osuosl.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Ian Abbott <abbotti@mev.co.uk>,
	stable@vger.kernel.org
Subject: [PATCH 05/14] staging: comedi: das800: Fix endian problem for AI command data
Date: Tue, 23 Feb 2021 14:30:46 +0000	[thread overview]
Message-ID: <20210223143055.257402-6-abbotti@mev.co.uk> (raw)
In-Reply-To: <20210223143055.257402-1-abbotti@mev.co.uk>

The analog input subdevice supports Comedi asynchronous commands that
use Comedi's 16-bit sample format.  However, the call to
`comedi_buf_write_samples()` is passing the address of a 32-bit integer
variable.  On bigendian machines, this will copy 2 bytes from the wrong
end of the 32-bit value.  Fix it by changing the type of the variable
holding the sample value to `unsigned short`.

Fixes: ad9eb43c93d8 ("staging: comedi: das800: use comedi_buf_write_samples()"
Cc: <stable@vger.kernel.org> # 3.19+
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
---
 drivers/staging/comedi/drivers/das800.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c
index 4ea100ff6930..2881808d6606 100644
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -427,7 +427,7 @@ static irqreturn_t das800_interrupt(int irq, void *d)
 	struct comedi_cmd *cmd;
 	unsigned long irq_flags;
 	unsigned int status;
-	unsigned int val;
+	unsigned short val;
 	bool fifo_empty;
 	bool fifo_overflow;
 	int i;
-- 
2.30.0

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  parent reply	other threads:[~2021-02-23 14:42 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-23 14:30 [PATCH 00/14] staging: comedi: Fix some command data endian problems Ian Abbott
2021-02-23 14:30 ` [PATCH 01/14] staging: comedi: addi_apci_1032: Fix endian problem for COS sample Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 02/14] staging: comedi: addi_apci_1500: Fix endian problem for command sample Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 03/14] staging: comedi: adv_pci1710: Fix endian problem for AI command data Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 04/14] staging: comedi: das6402: " Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` Ian Abbott [this message]
2021-02-23 14:30   ` [PATCH 05/14] staging: comedi: das800: " Ian Abbott
2021-02-23 14:30 ` [PATCH 06/14] staging: comedi: dmm32at: " Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 07/14] staging: comedi: me4000: " Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 08/14] staging: comedi: pcl711: " Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 09/14] staging: comedi: pcl818: " Ian Abbott
2021-02-23 14:30   ` Ian Abbott
2021-02-23 14:30 ` [PATCH 10/14] staging: comedi: amplc_pc236_common: Use 16-bit 0 for interrupt data Ian Abbott
2021-02-23 14:30 ` [PATCH 11/14] staging: comedi: comedi_parport: " Ian Abbott
2021-02-23 14:30 ` [PATCH 12/14] staging: comedi: ni_6527: " Ian Abbott
2021-02-23 14:30 ` [PATCH 13/14] staging: comedi: ni_65xx: " Ian Abbott
2021-02-23 14:30 ` [PATCH 14/14] staging: comedi: pcl726: " Ian Abbott

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