| Message ID | 1540388200-3956-6-git-send-email-bmeng.cn@gmail.com |
|---|---|
| State | Accepted |
| Commit | 223b10ca7a6b1d35db9c775033895969b132ad56 |
| Delegated to: | Simon Glass |
| Headers | show |
| Series | dm: DM_FLAG_PRE_RELOC flag clean up | expand |
On 24 October 2018 at 07:36, Bin Meng <bmeng.cn@gmail.com> wrote: > When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be > bound before relocation. However due to a bug in the DM core, > the flag only takes effect when devices are statically declared > via U_BOOT_DEVICE(). This bug has been fixed recently by commit > "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in > lists_bind_fdt()", but with the fix, it has a side effect that > all existing drivers that declared DM_FLAG_PRE_RELOC flag will > be bound before relocation now. This may expose potential boot > failure on some boards due to insufficient memory during the > pre-relocation stage. > > To mitigate this potential impact, the following changes are > implemented: > > - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver > only supports configuration from device tree (OF_CONTROL) > - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device > is statically declared via U_BOOT_DEVICE() > - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for > drivers that support both statically declared devices and > configuration from device tree > > Signed-off-by: Bin Meng <bmeng.cn@gmail.com> > --- > > drivers/mmc/omap_hsmmc.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Simon Glass <sjg@chromium.org>
On 24 October 2018 at 07:36, Bin Meng <bmeng.cn@gmail.com> wrote: > When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be > bound before relocation. However due to a bug in the DM core, > the flag only takes effect when devices are statically declared > via U_BOOT_DEVICE(). This bug has been fixed recently by commit > "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in > lists_bind_fdt()", but with the fix, it has a side effect that > all existing drivers that declared DM_FLAG_PRE_RELOC flag will > be bound before relocation now. This may expose potential boot > failure on some boards due to insufficient memory during the > pre-relocation stage. > > To mitigate this potential impact, the following changes are > implemented: > > - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver > only supports configuration from device tree (OF_CONTROL) > - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device > is statically declared via U_BOOT_DEVICE() > - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for > drivers that support both statically declared devices and > configuration from device tree > > Signed-off-by: Bin Meng <bmeng.cn@gmail.com> > --- > > drivers/mmc/omap_hsmmc.c | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Simon Glass <sjg@chromium.org> Applied to u-boot-dm/master, thanks!
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index ec853d0..5cb97eb 100644 --- a/drivers/mmc/omap_hsmmc.c +++ b/drivers/mmc/omap_hsmmc.c @@ -1953,6 +1953,8 @@ U_BOOT_DRIVER(omap_hsmmc) = { .ops = &omap_hsmmc_ops, .probe = omap_hsmmc_probe, .priv_auto_alloc_size = sizeof(struct omap_hsmmc_data), +#if !CONFIG_IS_ENABLED(OF_CONTROL) .flags = DM_FLAG_PRE_RELOC, +#endif }; #endif
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage. To mitigate this potential impact, the following changes are implemented: - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL) - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE() - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree Signed-off-by: Bin Meng <bmeng.cn@gmail.com> --- drivers/mmc/omap_hsmmc.c | 2 ++ 1 file changed, 2 insertions(+)