evie/android_kernel_oneplus_msm8998
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msm: mhl: sii8334: Fix null pointer dereference at power off

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Check for null pointer before disabling the regulators.
During cable connect/disconnect and suspend/resume check for
previous power state of mhl to avoid enabling/disabling gpio's
and regulators twice.

Change-Id: I44dc51122da4630974147b829236cb39c1ad54b0
Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>
This commit is contained in:
raghavendra ambadas 2014-09-08 13:58:22 +05:30 • committed by David Keitel
parent 6810e00992
commit 8f9568b4a0
1 changed files with 22 additions and 15 deletions
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13
drivers/video/fbdev/msm/mhl_sii8334.c
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@ -399,7 +399,7 @@ static int mhl_sii_config(struct mhl_tx_ctrl *mhl_ctrl, bool on)
client = mhl_ctrl->i2c_handle;
if (on) {
if (on && !mhl_ctrl->irq_req_done) {
rc = mhl_vreg_config(mhl_ctrl, 1);
if (rc) {
pr_err("%s: vreg init failed [%d]\n",
@ -424,7 +424,7 @@ static int mhl_sii_config(struct mhl_tx_ctrl *mhl_ctrl, bool on)
} else {
mhl_ctrl->irq_req_done = true;
}
} else {
} else if (!on && mhl_ctrl->irq_req_done) {
free_irq(mhl_ctrl->i2c_handle->irq, mhl_ctrl);
mhl_gpio_config(mhl_ctrl, 0);
mhl_vreg_config(mhl_ctrl, 0);
@ -1533,22 +1533,29 @@ static int mhl_sii_reg_config(struct i2c_client *client, bool enable)
pr_debug("%s\n", __func__);
if (!enable) {
if (reg_8941_vdda) {
regulator_disable(reg_8941_vdda);
regulator_put(reg_8941_vdda);
reg_8941_vdda = NULL;
}
if (reg_8941_smps3a) {
regulator_disable(reg_8941_smps3a);
regulator_put(reg_8941_smps3a);
reg_8941_smps3a = NULL;
}
if (reg_8941_l02) {
regulator_disable(reg_8941_l02);
regulator_put(reg_8941_l02);
reg_8941_l02 = NULL;
}
if (reg_8941_l24) {
regulator_disable(reg_8941_l24);
regulator_put(reg_8941_l24);
reg_8941_l24 = NULL;
}
return 0;
}