diff options
| author | David S. Miller <davem@davemloft.net> | 2020-03-12 21:29:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-12 22:34:48 -0700 |
| commit | 1d343579312311aa9875b34d5a921f5e2ec69f0a (patch) | |
| tree | 64b636b5557d92f5266187f035dac34862db86d5 /drivers/spi/atmel-quadspi.c | |
| parent | a8eceea84a3a3504e42f6495cf462027c5d19cb0 (diff) | |
| parent | 0d81a3f29c0afb18ba2b1275dcccf21e0dd4da38 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Minor overlapping changes, nothing serious.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/spi/atmel-quadspi.c')
| -rw-r--r-- | drivers/spi/atmel-quadspi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c index fd8007ebb145..13def7f78b9e 100644 --- a/drivers/spi/atmel-quadspi.c +++ b/drivers/spi/atmel-quadspi.c @@ -149,6 +149,7 @@ struct atmel_qspi { struct clk *qspick; struct platform_device *pdev; const struct atmel_qspi_caps *caps; + resource_size_t mmap_size; u32 pending; u32 mr; u32 scr; @@ -329,6 +330,14 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) u32 sr, offset; int err; + /* + * Check if the address exceeds the MMIO window size. An improvement + * would be to add support for regular SPI mode and fall back to it + * when the flash memories overrun the controller's memory space. + */ + if (op->addr.val + op->data.nbytes > aq->mmap_size) + return -ENOTSUPP; + err = atmel_qspi_set_cfg(aq, op, &offset); if (err) return err; @@ -480,6 +489,8 @@ static int atmel_qspi_probe(struct platform_device *pdev) goto exit; } + aq->mmap_size = resource_size(res); + /* Get the peripheral clock */ aq->pclk = devm_clk_get(&pdev->dev, "pclk"); if (IS_ERR(aq->pclk)) |