diff options
Diffstat (limited to 'package')
| -rw-r--r-- | package/boot/uboot-mvebu/patches/012-nvme-Do-not-allocate-8kB-buffer-on-stack.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/package/boot/uboot-mvebu/patches/012-nvme-Do-not-allocate-8kB-buffer-on-stack.patch b/package/boot/uboot-mvebu/patches/012-nvme-Do-not-allocate-8kB-buffer-on-stack.patch new file mode 100644 index 0000000000..20046c67b6 --- /dev/null +++ b/package/boot/uboot-mvebu/patches/012-nvme-Do-not-allocate-8kB-buffer-on-stack.patch @@ -0,0 +1,92 @@ +From d17ab6e1289b1d705c75de8a2351218962fb7352 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Thu, 9 Dec 2021 11:06:39 +0100 +Subject: [PATCH] nvme: Do not allocate 8kB buffer on stack +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Calling 'nvme scan' followed by 'nvme detail' crashes U-Boot on Turris +Omnia with the following error: + + undefined instruction + pc : [<0a000000>] lr : [<7ff80bfc>] + reloc pc : [<8a8c0000>] lr : [<00840bfc>] + sp : 7fb2b908 ip : 0000002a fp : 02000000 + r10: 04000000 r9 : 7fb2fed0 r8 : e1000000 + r7 : 0c000000 r6 : 03000000 r5 : 06000000 r4 : 01000000 + r3 : 7fb30928 r2 : 7fb30928 r1 : 00000000 r0 : 00000000 + Flags: nZCv IRQs off FIQs off Mode SVC_32 + Code: 0f0fb4f0 0f0fb4f0 0f0fb4f0 0f0fb4f0 (f0f04b0f) + Resetting CPU ... + +This happens when nvme_print_info() tries to return to the caller. It +looks like this error is caused by trying to allocate 8 KiB of memory +on the stack by the two uses of ALLOC_CACHE_ALIGN_BUFFER(). + +Use malloc_cache_aligned() to allocate this memory dynamically instead. + +This fixes 'nvme detail' on Turris Omnia. + +Note that similar change was applied to file drivers/nvme/nvme.c in past by +commit 2f83481dff9c ("nvme: use page-aligned buffer for identify command"). + +Signed-off-by: Pali Rohár <pali@kernel.org> +Signed-off-by: Marek Behún <marek.behun@nic.cz> +--- + drivers/nvme/nvme_show.c | 35 ++++++++++++++++++++++++++--------- + 1 file changed, 26 insertions(+), 9 deletions(-) + +--- a/drivers/nvme/nvme_show.c ++++ b/drivers/nvme/nvme_show.c +@@ -106,24 +106,41 @@ int nvme_print_info(struct udevice *udev + { + struct nvme_ns *ns = dev_get_priv(udev); + struct nvme_dev *dev = ns->dev; +- ALLOC_CACHE_ALIGN_BUFFER(char, buf_ns, sizeof(struct nvme_id_ns)); +- struct nvme_id_ns *id = (struct nvme_id_ns *)buf_ns; +- ALLOC_CACHE_ALIGN_BUFFER(char, buf_ctrl, sizeof(struct nvme_id_ctrl)); +- struct nvme_id_ctrl *ctrl = (struct nvme_id_ctrl *)buf_ctrl; ++ struct nvme_id_ctrl *ctrl; ++ struct nvme_id_ns *id; ++ int ret = 0; + +- if (nvme_identify(dev, 0, 1, (dma_addr_t)(long)ctrl)) +- return -EIO; ++ ctrl = memalign(dev->page_size, sizeof(struct nvme_id_ctrl)); ++ if (!ctrl) ++ return -ENOMEM; ++ ++ if (nvme_identify(dev, 0, 1, (dma_addr_t)(long)ctrl)) { ++ ret = -EIO; ++ goto free_ctrl; ++ } + + print_optional_admin_cmd(le16_to_cpu(ctrl->oacs), ns->devnum); + print_optional_nvm_cmd(le16_to_cpu(ctrl->oncs), ns->devnum); + print_format_nvme_attributes(ctrl->fna, ns->devnum); + +- if (nvme_identify(dev, ns->ns_id, 0, (dma_addr_t)(long)id)) +- return -EIO; ++ id = memalign(dev->page_size, sizeof(struct nvme_id_ns)); ++ if (!id) { ++ ret = -ENOMEM; ++ goto free_ctrl; ++ } ++ ++ if (nvme_identify(dev, ns->ns_id, 0, (dma_addr_t)(long)id)) { ++ ret = -EIO; ++ goto free_id; ++ } + + print_formats(id, ns); + print_data_protect_cap(id->dpc, ns->devnum); + print_metadata_cap(id->mc, ns->devnum); + +- return 0; ++free_id: ++ free(id); ++free_ctrl: ++ free(ctrl); ++ return ret; + } |