On Wed, Feb 10, 2021 at 01:44:34PM +0200, Tudor Ambarus wrote:
> This is a follow-up for:
> commit 3c9ea42802a1 ("clk: Mark fwnodes when their clock provider is added/removed")
>
> The above commit updated the deprecated of_clk_add_provider(),
> but missed to update the preferred of_clk_add_hw_provider().
> Update it now.
>
> Signed-off-by: Tudor Ambarus <[email protected]>
> Reviewed-by: Saravana Kannan <[email protected]>
> ---
> drivers/clk/clk.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 27ff90eacb1f..9370e4dfecae 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -4594,6 +4594,8 @@ int of_clk_add_hw_provider(struct device_node *np,
> if (ret < 0)
> of_clk_del_provider(np);
>
> + fwnode_dev_initialized(&np->fwnode, true);
> +
This causes a crash when booting raspi2 images in qemu.
[ 22.123618] Unable to handle kernel NULL pointer dereference at virtual address 00000028
[ 22.123830] pgd = (ptrval)
[ 22.123992] [00000028] *pgd=00000000
[ 22.124579] Internal error: Oops: 5 [#1] SMP ARM
...
[ 22.141624] [<c0a2f4d8>] (of_clk_add_hw_provider) from [<c0a2f54c>] (devm_of_clk_add_hw_provider+0x48/0x80)
[ 22.141819] [<c0a2f54c>] (devm_of_clk_add_hw_provider) from [<c0a43ad8>] (raspberrypi_clk_probe+0x25c/0x384)
[ 22.141976] [<c0a43ad8>] (raspberrypi_clk_probe) from [<c0c18da0>] (platform_probe+0x5c/0xb8)
[ 22.142114] [<c0c18da0>] (platform_probe) from [<c0c16654>] (really_probe+0xf0/0x39c)
[ 22.142246] [<c0c16654>] (really_probe) from [<c0c16968>] (driver_probe_device+0x68/0xc0)
[ 22.142377] [<c0c16968>] (driver_probe_device) from [<c0c14834>] (bus_for_each_drv+0x84/0xc8)...
np can (and will) be NULL here. See of_clk_set_defaults().
Guenter
---
Bisect log:
# bad: [9d49ed9ca93b8c564033c1d6808017bc9052b5db] Add linux-next specific files for 20210329
# good: [0d02ec6b3136c73c09e7859f0d0e4e2c4c07b49b] Linux 5.12-rc4
git bisect start 'HEAD' 'v5.12-rc4'
# good: [4b15c5b50e5ec7f2d80275d5a150807b7b9a0a0c] Merge remote-tracking branch 'crypto/master'
git bisect good 4b15c5b50e5ec7f2d80275d5a150807b7b9a0a0c
# good: [c92ad2dfc1a3bc31afc3d41af82c38accf2c3783] Merge remote-tracking branch 'ftrace/for-next'
git bisect good c92ad2dfc1a3bc31afc3d41af82c38accf2c3783
# bad: [103c8000962c33e274244a02a0383d20fab734c9] Merge remote-tracking branch 'staging/staging-next'
git bisect bad 103c8000962c33e274244a02a0383d20fab734c9
# bad: [05ee9b17ef7af7d47395caa48db55d0e2dae64a2] Merge remote-tracking branch 'tty/tty-next'
git bisect bad 05ee9b17ef7af7d47395caa48db55d0e2dae64a2
# good: [bd91c862df59c0290c8a2e2ee6467c0ed5fb6432] Merge remote-tracking branch 'workqueues/for-next'
git bisect good bd91c862df59c0290c8a2e2ee6467c0ed5fb6432
# good: [24327c478b2fc17a01b21a4721f35f22a51fe12b] usb: mtu3: drop CONFIG_OF
git bisect good 24327c478b2fc17a01b21a4721f35f22a51fe12b
# bad: [04c49226ac79b3e5bd0f89da69a64ba2e0cccb91] Merge remote-tracking branch 'usb-serial/usb-next'
git bisect bad 04c49226ac79b3e5bd0f89da69a64ba2e0cccb91
# good: [21a292d73a6e69f31c57d36288482c40b355daf0] Merge remote-tracking branch 'drivers-x86/for-next'
git bisect good 21a292d73a6e69f31c57d36288482c40b355daf0
# bad: [b6688015151857ed3f61fa2344c4b220bc9dc4d7] regulator: qcom_spmi-regulator: Clean-up by using managed work init
git bisect bad b6688015151857ed3f61fa2344c4b220bc9dc4d7
# good: [ea718c699055c8566eb64432388a04974c43b2ea] Revert "Revert "driver core: Set fw_devlink=on by default""
git bisect good ea718c699055c8566eb64432388a04974c43b2ea
# bad: [0341ce5443949588e93581b49b934cdde2befbf8] workqueue: Add resource managed version of delayed work init
git bisect bad 0341ce5443949588e93581b49b934cdde2befbf8
# bad: [0b8bf06f67191e6a3184802a690d3f521c6d7e78] device property: Sync descriptions of swnode array and group APIs
git bisect bad 0b8bf06f67191e6a3184802a690d3f521c6d7e78
# bad: [6579c8d97ad7fc5671ee60234f3b8388abee5f77] clk: Mark fwnodes when their clock provider is added
git bisect bad 6579c8d97ad7fc5671ee60234f3b8388abee5f77
# first bad commit: [6579c8d97ad7fc5671ee60234f3b8388abee5f77] clk: Mark fwnodes when their clock provider is added
On Tue, Mar 30, 2021 at 8:42 AM Guenter Roeck <[email protected]> wrote:
>
> On Wed, Feb 10, 2021 at 01:44:34PM +0200, Tudor Ambarus wrote:
> > This is a follow-up for:
> > commit 3c9ea42802a1 ("clk: Mark fwnodes when their clock provider is added/removed")
> >
> > The above commit updated the deprecated of_clk_add_provider(),
> > but missed to update the preferred of_clk_add_hw_provider().
> > Update it now.
> >
> > Signed-off-by: Tudor Ambarus <[email protected]>
> > Reviewed-by: Saravana Kannan <[email protected]>
> > ---
> > drivers/clk/clk.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index 27ff90eacb1f..9370e4dfecae 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -4594,6 +4594,8 @@ int of_clk_add_hw_provider(struct device_node *np,
> > if (ret < 0)
> > of_clk_del_provider(np);
> >
> > + fwnode_dev_initialized(&np->fwnode, true);
> > +
>
> This causes a crash when booting raspi2 images in qemu.
>
> [ 22.123618] Unable to handle kernel NULL pointer dereference at virtual address 00000028
> [ 22.123830] pgd = (ptrval)
> [ 22.123992] [00000028] *pgd=00000000
> [ 22.124579] Internal error: Oops: 5 [#1] SMP ARM
> ...
> [ 22.141624] [<c0a2f4d8>] (of_clk_add_hw_provider) from [<c0a2f54c>] (devm_of_clk_add_hw_provider+0x48/0x80)
> [ 22.141819] [<c0a2f54c>] (devm_of_clk_add_hw_provider) from [<c0a43ad8>] (raspberrypi_clk_probe+0x25c/0x384)
> [ 22.141976] [<c0a43ad8>] (raspberrypi_clk_probe) from [<c0c18da0>] (platform_probe+0x5c/0xb8)
> [ 22.142114] [<c0c18da0>] (platform_probe) from [<c0c16654>] (really_probe+0xf0/0x39c)
> [ 22.142246] [<c0c16654>] (really_probe) from [<c0c16968>] (driver_probe_device+0x68/0xc0)
> [ 22.142377] [<c0c16968>] (driver_probe_device) from [<c0c14834>] (bus_for_each_drv+0x84/0xc8)...
>
> np can (and will) be NULL here. See of_clk_set_defaults().
Thanks for the report. It was reported earlier by Marek and there's a
discussion going on about it in the thread.
-Saravana