diff options
| author | Marek Vasut <marex@denx.de> | 2024-10-30 14:02:53 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-11-05 14:01:19 +0100 |
| commit | da9596955c05966768364ab1cad2f43fcddc6f06 (patch) | |
| tree | 8c3a117ad2e27cb382e7ef350ee1a2d7f73e9a38 | |
| parent | ce8f9fb651fac95dd41f69afe54d935420b945bd (diff) | |
nvmem: core: Check read_only flag for force_ro in bin_attr_nvmem_write()
The bin_attr_nvmem_write() must check the read_only flag and block
writes on read-only devices, now that a nvmem device can be switched
between read-write and read-only mode at runtime using the force_ro
attribute. Add the missing check.
Fixes: 9d7eb234ac7a ("nvmem: core: Implement force_ro sysfs attribute")
Cc: Stable@vger.kernel.org
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20241030140253.40445-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/nvmem/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 66eec1960801..90c46f6e465d 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -267,7 +267,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj, count = round_down(count, nvmem->word_size); - if (!nvmem->reg_write) + if (!nvmem->reg_write || nvmem->read_only) return -EPERM; rc = nvmem_reg_write(nvmem, pos, buf, count); |