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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2020-03-16 20:41:03 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2020-03-16 21:24:23 +0100 |
| commit | 0f6d04457a64f2393b05f662dc8d381ea1963c66 (patch) | |
| tree | 2d6a3c82d5e6d02b030b16df66da8bf9209b02ec /target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch | |
| parent | d890f85e59617228b1e76e8cf45a9309904d9124 (diff) | |
| download | upstream-0f6d04457a64f2393b05f662dc8d381ea1963c66.tar.gz upstream-0f6d04457a64f2393b05f662dc8d381ea1963c66.tar.bz2 upstream-0f6d04457a64f2393b05f662dc8d381ea1963c66.zip | |
bcm27xx: sync 5.4 patches with RPi Foundation
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch b/target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch new file mode 100644 index 0000000000..60c9c9b03f --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0282-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch @@ -0,0 +1,39 @@ +From d6baa1bd90e7e68ac69d5378d70174ea67bf35dc Mon Sep 17 00:00:00 2001 +From: James Hughes <james.hughes@raspberrypi.org> +Date: Mon, 29 Jul 2019 12:02:59 +0100 +Subject: [PATCH] Fixup FKMS interrupt handing for non-existent display + +If an errant interrupt flag was received from a non-existent display, +a NULL pointer access was made. Protect against this by checking if a +second display is present prior to checking the interrupt flags. +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 17 ++++++++++------- + 1 file changed, 10 insertions(+), 7 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -1087,14 +1087,17 @@ static irqreturn_t vc4_crtc_irq_handler( + vc4_crtc_handle_page_flip(crtc_list[0]); + } + +- /* Check for the secondary display too */ +- chan = readl(crtc_list[0]->regs + SMIDSW1); ++ if (crtc_list[1]) { ++ /* Check for the secondary display too */ ++ chan = readl(crtc_list[0]->regs + SMIDSW1); + +- if (chan & 1) { +- writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1); +- if (crtc_list[1]->vblank_enabled) +- drm_crtc_handle_vblank(&crtc_list[1]->base); +- vc4_crtc_handle_page_flip(crtc_list[1]); ++ if (chan & 1) { ++ writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1); ++ ++ if (crtc_list[1]->vblank_enabled) ++ drm_crtc_handle_vblank(&crtc_list[1]->base); ++ vc4_crtc_handle_page_flip(crtc_list[1]); ++ } + } + } + |