hid: intel-ish-hid: Fix uninitialized variable 'rv' in ish_fw_xfer_di…

…rect_dma

commit d41bff05a61fb539f21e9bf0d39fac77f457434e upstream.

Fix the uninitialized symbol 'rv' in the function ish_fw_xfer_direct_dma
to resolve the following warning from the smatch tool:
drivers/hid/intel-ish-hid/ishtp-fw-loader.c:714 ish_fw_xfer_direct_dma()
error: uninitialized symbol 'rv'.
Initialize 'rv' to 0 to prevent undefined behavior from uninitialized
access.

Cc: stable@vger.kernel.org
Fixes: 91b2281 ("HID: intel-ish-hid: ISH firmware loader client driver")
Signed-off-by: SurajSonawane2415 <surajsonawane0215@gmail.com>
Link: https://patch.msgid.link/20241004075944.44932-1-surajsonawane0215@gmail.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hid/intel-ish-hid/ishtp-fw-loader.c

@@ -630,7 +630,7 @@ static int ish_fw_xfer_direct_dma(struct ishtp_cl_data *client_data,
  const struct firmware *fw,
  const struct shim_fw_info fw_info)
 {
- int rv;
+ int rv = 0;
  void *dma_buf;
  dma_addr_t dma_buf_phy;
  u32 fragment_offset, fragment_size, payload_max_size;