From: Christian Marangi ansuelsmth@gmail.com
commit bcb889891371c3cf767f2b9e8768cfe2fdd3810f upstream.
Commit ebeb20a9cd3f ("soc: qcom: mdt_loader: Always invoke PAS mem_setup") dropped the relocate check and made pas_mem_setup run unconditionally. The code was later moved with commit f4e526ff7e38 ("soc: qcom: mdt_loader: Extract PAS operations") to qcom_mdt_pas_init() effectively losing track of what was actually done.
The assumption that PAS mem_setup can be done anytime was effectively wrong, with no good reason and this caused regression on some SoC that use remoteproc to bringup ath11k. One example is IPQ8074 SoC that effectively broke resulting in remoteproc silently die and ath11k not working.
On this SoC FW relocate is not enabled and PAS mem_setup was correctly skipped in previous kernel version resulting in correct bringup and function of remoteproc and ath11k.
To fix the regression, reintroduce the relocate check in qcom_mdt_pas_init() and correctly skip PAS mem_setup where relocate is not enabled.
Fixes: ebeb20a9cd3f ("soc: qcom: mdt_loader: Always invoke PAS mem_setup") Tested-by: Robert Marko robimarko@gmail.com Co-developed-by: Robert Marko robimarko@gmail.com Signed-off-by: Robert Marko robimarko@gmail.com Signed-off-by: Christian Marangi ansuelsmth@gmail.com Cc: stable@vger.kernel.org Reviewed-by: Mukesh Ojha quic_mojha@quicinc.com Signed-off-by: Bjorn Andersson andersson@kernel.org Link: https://lore.kernel.org/r/20230526115511.3328-1-ansuelsmth@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/soc/qcom/mdt_loader.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
--- a/drivers/soc/qcom/mdt_loader.c +++ b/drivers/soc/qcom/mdt_loader.c @@ -210,6 +210,7 @@ int qcom_mdt_pas_init(struct device *dev const struct elf32_hdr *ehdr; phys_addr_t min_addr = PHYS_ADDR_MAX; phys_addr_t max_addr = 0; + bool relocate = false; size_t metadata_len; void *metadata; int ret; @@ -224,6 +225,9 @@ int qcom_mdt_pas_init(struct device *dev if (!mdt_phdr_valid(phdr)) continue;
+ if (phdr->p_flags & QCOM_MDT_RELOCATABLE) + relocate = true; + if (phdr->p_paddr < min_addr) min_addr = phdr->p_paddr;
@@ -246,11 +250,13 @@ int qcom_mdt_pas_init(struct device *dev goto out; }
- ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr); - if (ret) { - /* Unable to set up relocation */ - dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name); - goto out; + if (relocate) { + ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr); + if (ret) { + /* Unable to set up relocation */ + dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name); + goto out; + } }
out: