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Input: hideep - fix the uninitialized use in hideep_nvm_unlock()
[ Upstream commit cac7100d4c51c04979dacdfe6c9a5e400d3f0a27 ] Inside function hideep_nvm_unlock(), variable "unmask_code" could be uninitialized if hideep_pgm_r_reg() returns error, however, it is used in the later if statement after an "and" operation, which is potentially unsafe. Signed-off-by: Yizhuo <yzhai003@ucr.edu> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -361,13 +361,16 @@ static int hideep_enter_pgm(struct hideep_ts *ts)
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return -EIO;
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}
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static void hideep_nvm_unlock(struct hideep_ts *ts)
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static int hideep_nvm_unlock(struct hideep_ts *ts)
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{
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u32 unmask_code;
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int error;
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hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_SFR_RPAGE);
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hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code);
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error = hideep_pgm_r_reg(ts, 0x0000000C, &unmask_code);
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hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE);
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if (error)
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return error;
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/* make it unprotected code */
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unmask_code &= ~HIDEEP_PROT_MODE;
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@ -384,6 +387,8 @@ static void hideep_nvm_unlock(struct hideep_ts *ts)
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NVM_W_SFR(HIDEEP_NVM_MASK_OFS, ts->nvm_mask);
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SET_FLASH_HWCONTROL();
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hideep_pgm_w_reg(ts, HIDEEP_FLASH_CFG, HIDEEP_NVM_DEFAULT_PAGE);
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return 0;
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}
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static int hideep_check_status(struct hideep_ts *ts)
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@ -462,7 +467,9 @@ static int hideep_program_nvm(struct hideep_ts *ts,
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u32 addr = 0;
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int error;
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hideep_nvm_unlock(ts);
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error = hideep_nvm_unlock(ts);
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if (error)
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return error;
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while (ucode_len > 0) {
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xfer_len = min_t(size_t, ucode_len, HIDEEP_NVM_PAGE_SIZE);
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