From: Heinrich Schuchardt <xypron.glpk@gmx.de>
To: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: u-boot@lists.denx.de, agraf@csgraf.de
Subject: Re: [PATCH] efi_driver: fix a wrong cast
Date: Mon, 27 Sep 2021 09:48:54 +0200 [thread overview]
Message-ID: <30faf0b0-237d-02f3-9e35-6e746f1b3f52@gmx.de> (raw)
In-Reply-To: <20210927043054.32727-1-takahiro.akashi@linaro.org>
On 9/27/21 6:30 AM, AKASHI Takahiro wrote:
> struct efi_driver_binding_protocol, i.e. bp, is not the first element
> in struct efi_driver_binding_extended_protocol.
> So the casting:
> struct efi_driver_binding_extended_protocol *bp =
> (struct efi_driver_binding_extended_protocol *)this;
> is simply wrong.
The definition in include/efi_driver.h is:
/*
* This structure adds internal fields to the driver binding protocol.
*/
struct efi_driver_binding_extended_protocol {
struct efi_driver_binding_protocol bp;
const struct efi_driver_ops *ops;
};
Why do you claim "bp is not the first element"?
The whole efi_driver code relies on the fact that the
efi_driver_binding_extended_protocol can be interpreted as
efi_driver_binding_protocol.
Best regards
Heinrich
>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> ---
> lib/efi_driver/efi_uclass.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/lib/efi_driver/efi_uclass.c b/lib/efi_driver/efi_uclass.c
> index 382c2b477f4d..9e784f9c237f 100644
> --- a/lib/efi_driver/efi_uclass.c
> +++ b/lib/efi_driver/efi_uclass.c
> @@ -65,8 +65,8 @@ static efi_status_t EFIAPI efi_uc_supported(
> {
> efi_status_t r, ret;
> void *interface;
> - struct efi_driver_binding_extended_protocol *bp =
> - (struct efi_driver_binding_extended_protocol *)this;
> + struct efi_driver_binding_extended_protocol *bp = container_of(this,
> + struct efi_driver_binding_extended_protocol, bp);
>
> EFI_ENTRY("%p, %p, %ls", this, controller_handle,
> efi_dp_str(remaining_device_path));
> @@ -113,8 +113,8 @@ static efi_status_t EFIAPI efi_uc_start(
> {
> efi_status_t r, ret;
> void *interface = NULL;
> - struct efi_driver_binding_extended_protocol *bp =
> - (struct efi_driver_binding_extended_protocol *)this;
> + struct efi_driver_binding_extended_protocol *bp = container_of(this,
> + struct efi_driver_binding_extended_protocol, bp);
>
> EFI_ENTRY("%p, %p, %ls", this, controller_handle,
> efi_dp_str(remaining_device_path));
> @@ -201,8 +201,8 @@ static efi_status_t EFIAPI efi_uc_stop(
> efi_status_t ret;
> efi_uintn_t count;
> struct efi_open_protocol_info_entry *entry_buffer;
> - struct efi_driver_binding_extended_protocol *bp =
> - (struct efi_driver_binding_extended_protocol *)this;
> + struct efi_driver_binding_extended_protocol *bp = container_of(this,
> + struct efi_driver_binding_extended_protocol, bp);
>
> EFI_ENTRY("%p, %p, %zu, %p", this, controller_handle,
> number_of_children, child_handle_buffer);
> @@ -283,7 +283,7 @@ static efi_status_t efi_add_driver(struct driver *drv)
> }
> bp->bp.image_handle = bp->bp.driver_binding_handle;
> ret = efi_add_protocol(bp->bp.driver_binding_handle,
> - &efi_guid_driver_binding_protocol, bp);
> + &efi_guid_driver_binding_protocol, &bp->bp);
> if (ret != EFI_SUCCESS) {
> efi_delete_handle(bp->bp.driver_binding_handle);
> free(bp);
>
next prev parent reply other threads:[~2021-09-27 7:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 4:30 [PATCH] efi_driver: fix a wrong cast AKASHI Takahiro
2021-09-27 7:48 ` Heinrich Schuchardt [this message]
2021-09-27 8:53 ` AKASHI Takahiro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=30faf0b0-237d-02f3-9e35-6e746f1b3f52@gmx.de \
--to=xypron.glpk@gmx.de \
--cc=agraf@csgraf.de \
--cc=takahiro.akashi@linaro.org \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.