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spi: Fixes for v6.2

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A couple of hopefully final fixes for spi, one driver specific fix for
 an issue with very large transfers and a fix for an issue with the
 locking fixes in spidev merged earlier this release cycle which was
 missed.
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Merge tag 'spi-fix-v6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A couple of hopefully final fixes for spi: one driver specific fix for
  an issue with very large transfers and a fix for an issue with the
  locking fixes in spidev merged earlier this release cycle which was
  missed"

* tag 'spi-fix-v6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spidev: fix a recursive locking error
  spi: dw: Fix wrong FIFO level setting for long xfers
This commit is contained in:
Linus Torvalds 2023-02-11 16:39:05 -08:00
commit f339c2597e
2 changed files with 17 additions and 7 deletions
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2
drivers/spi/spi-dw-core.c
View file

@ -366,7 +366,7 @@ static void dw_spi_irq_setup(struct dw_spi *dws)
* will be adjusted at the final stage of the IRQ-based SPI transfer
* execution so not to lose the leftover of the incoming data.
*/
level = min_t(u16, dws->fifo_len / 2, dws->tx_len);
level = min_t(unsigned int, dws->fifo_len / 2, dws->tx_len);
dw_writel(dws, DW_SPI_TXFTLR, level);
dw_writel(dws, DW_SPI_RXFTLR, level - 1);

22
drivers/spi/spidev.c
View file

@ -89,10 +89,22 @@ MODULE_PARM_DESC(bufsiz, "data bytes in biggest supported SPI message");
/*-------------------------------------------------------------------------*/
static ssize_t
spidev_sync_unlocked(struct spi_device *spi, struct spi_message *message)
{
ssize_t status;
status = spi_sync(spi, message);
if (status == 0)
status = message->actual_length;
return status;
}
static ssize_t
spidev_sync(struct spidev_data *spidev, struct spi_message *message)
{
int status;
ssize_t status;
struct spi_device *spi;
mutex_lock(&spidev->spi_lock);
@ -101,12 +113,10 @@ spidev_sync(struct spidev_data *spidev, struct spi_message *message)
if (spi == NULL)
status = -ESHUTDOWN;
else
status = spi_sync(spi, message);
if (status == 0)
status = message->actual_length;
status = spidev_sync_unlocked(spi, message);
mutex_unlock(&spidev->spi_lock);
return status;
}
@ -294,7 +304,7 @@ static int spidev_message(struct spidev_data *spidev,
spi_message_add_tail(k_tmp, &msg);
}
status = spidev_sync(spidev, &msg);
status = spidev_sync_unlocked(spidev->spi, &msg);
if (status < 0)
goto done;