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firmware: tegra: Changes for v5.20-rc1

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Contains a fix that avoids unaligned accesses to IPC memory, which in
 turn helps in suppressing speculative reads from out-of-bounds memory.
 
 Another patch performs some minor cleanup around debugfs API usage.
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Merge tag 'tegra-for-5.20-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

firmware: tegra: Changes for v5.20-rc1

Contains a fix that avoids unaligned accesses to IPC memory, which in
turn helps in suppressing speculative reads from out-of-bounds memory.

Another patch performs some minor cleanup around debugfs API usage.

* tag 'tegra-for-5.20-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  firmware: tegra: Fix error check return value of debugfs_create_file()
  firmware: tegra: bpmp: Do only aligned access to IPC memory area

Link: https://lore.kernel.org/r/20220708185608.676474-3-thierry.reding@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-07-12 22:52:21 +02:00
commit 933edcde43
2 changed files with 8 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/firmware/tegra/bpmp-debugfs.c
View file

@ -474,7 +474,7 @@ static int bpmp_populate_debugfs_inband(struct tegra_bpmp *bpmp,
mode |= attrs & DEBUGFS_S_IWUSR ? 0200 : 0;
dentry = debugfs_create_file(name, mode, parent, bpmp,
&bpmp_debug_fops);
if (!dentry) {
if (IS_ERR(dentry)) {
err = -ENOMEM;
goto out;
}
@ -725,7 +725,7 @@ static int bpmp_populate_dir(struct tegra_bpmp *bpmp, struct seqbuf *seqbuf,
if (t & DEBUGFS_S_ISDIR) {
dentry = debugfs_create_dir(name, parent);
if (!dentry)
if (IS_ERR(dentry))
return -ENOMEM;
err = bpmp_populate_dir(bpmp, seqbuf, dentry, depth+1);
if (err < 0)
@ -738,7 +738,7 @@ static int bpmp_populate_dir(struct tegra_bpmp *bpmp, struct seqbuf *seqbuf,
dentry = debugfs_create_file(name, mode,
parent, bpmp,
&debugfs_fops);
if (!dentry)
if (IS_ERR(dentry))
return -ENOMEM;
}
}
@ -788,11 +788,11 @@ int tegra_bpmp_init_debugfs(struct tegra_bpmp *bpmp)
return 0;
root = debugfs_create_dir("bpmp", NULL);
if (!root)
if (IS_ERR(root))
return -ENOMEM;
bpmp->debugfs_mirror = debugfs_create_dir("debug", root);
if (!bpmp->debugfs_mirror) {
if (IS_ERR(bpmp->debugfs_mirror)) {
err = -ENOMEM;
goto out;
}

6
drivers/firmware/tegra/bpmp.c
View file

@ -201,7 +201,7 @@ static ssize_t __tegra_bpmp_channel_read(struct tegra_bpmp_channel *channel,
int err;
if (data && size > 0)
memcpy(data, channel->ib->data, size);
memcpy_fromio(data, channel->ib->data, size);
err = tegra_bpmp_ack_response(channel);
if (err < 0)
@ -245,7 +245,7 @@ static ssize_t __tegra_bpmp_channel_write(struct tegra_bpmp_channel *channel,
channel->ob->flags = flags;
if (data && size > 0)
memcpy(channel->ob->data, data, size);
memcpy_toio(channel->ob->data, data, size);
return tegra_bpmp_post_request(channel);
}
@ -420,7 +420,7 @@ void tegra_bpmp_mrq_return(struct tegra_bpmp_channel *channel, int code,
channel->ob->code = code;
if (data && size > 0)
memcpy(channel->ob->data, data, size);
memcpy_toio(channel->ob->data, data, size);
err = tegra_bpmp_post_response(channel);
if (WARN_ON(err < 0))