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Code Issues Releases Wiki Activity

can: m_can: pci: fix iomap_read_fifo() and iomap_write_fifo()

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The same fix that was previously done in m_can_platform in commit
99d173fbe8 ("can: m_can: fix iomap_read_fifo() and iomap_write_fifo()")
is required in m_can_pci as well to make iomap_read_fifo() and
iomap_write_fifo() work for val_count > 1.

Fixes: 812270e544 ("can: m_can: Batch FIFO writes during CAN transmit")
Fixes: 1aa6772f64 ("can: m_can: Batch FIFO reads during CAN receive")
Link: https://lore.kernel.org/all/20211118144011.10921-1-matthias.schiffer@ew.tq-group.com
Cc: stable@vger.kernel.org
Cc: Matt Kline <matt@bitbashing.io>
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Matthias Schiffer 2021-11-18 15:40:11 +01:00 committed by Marc Kleine-Budde
parent 31cb32a590
commit d737de2d7c
1 changed files with 12 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
drivers/net/can/m_can/m_can_pci.c
View file

@ -42,8 +42,13 @@ static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
static int iomap_read_fifo(struct m_can_classdev *cdev, int offset, void *val, size_t val_count)
{
struct m_can_pci_priv *priv = cdev_to_priv(cdev);
void __iomem *src = priv->base + offset;
ioread32_rep(priv->base + offset, val, val_count);
while (val_count--) {
*(unsigned int *)val = ioread32(src);
val += 4;
src += 4;
}
return 0;
}
@ -61,8 +66,13 @@ static int iomap_write_fifo(struct m_can_classdev *cdev, int offset,
const void *val, size_t val_count)
{
struct m_can_pci_priv *priv = cdev_to_priv(cdev);
void __iomem *dst = priv->base + offset;
iowrite32_rep(priv->base + offset, val, val_count);
while (val_count--) {
iowrite32(*(unsigned int *)val, dst);
val += 4;
dst += 4;
}
return 0;
}