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a=ed25519-sha256; t=1791373080; l=1169; i=vinayak.katoch@oss.qualcomm.com; s=20260609; h=from:subject:message-id; bh=gGD419HTG2YpsaHNWK2vNobX0Re5xBVQ3uFHDD/+SiU=; b=90TJaGDgNrl6dlM0/JPg8Mf4kKYytQP3bL9Qe+l+GIxIRzkUfSCjcUANnGLpy6fm9kNBZCWSb 3ODYMHKxMpsCFjRZqNkTgp/MnPK8wHPv5693P266MSp6p0LTOzg6WMk X-Developer-Key: i=vinayak.katoch@oss.qualcomm.com; a=ed25519; pk=UrGeKKxjIjpHZIjsbQKS/8rrVaP9KVGki69pFclCH08= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA3MDA0NiBTYWx0ZWRfX+rnfBDmroHKw VJlDR4mxPx4Gbv1bInVoNUlCcaxUI6KRCTWeiuJaEK4W6J+8emDD7e6965goW6lWoWXEfYlQ9Pl nNoVUPgh4aJU87mEqvWo7MEq/NneiBweHiCaHvlo3lshM/dw04xNpxuEr8XdMA6/pgWzqhnK5HP Z6a7k0xlgm86NVtBtw1W2/cZxiJRYCiPSFzitJyCwlJl/U2IVmc0q06ouVUBpQ7NVzEQKr2HmyZ 4enGPT+JilsIPT16EDf+CrauYydedMZhdUimnITeTc0bclPPJbqUb8ZF4bdUeBoekd69MwBw35I O/RHaGkjdX++PsWdNQchz6vIxWVL53Ule7j+473+6nwKSrEa/DbXB+rMAN+DfIOeXdHZztihFHc Ro1CLr0bJx4OAn2czkT5waML8E+SxaULlI2toCsky6jIYU/8BWxcQ2RZg5QKPE3PBEV0XhxwiYq uba9XK28dORUpz0R/zQ== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA3MDA0NiBTYWx0ZWRfX+vRGM0sH0x/s uneSNIjUG2QS3hBsxRYdhYwQh2qzr3oiAx452X9LBErx2/AT2pGVpqY1W+cIfyk+80PysOrXwPx ihA0VbCJRPT//N//3qc8ijW6xifQeDM= X-Proofpoint-ORIG-GUID: WHyL5aQXTySzeQ11X6pGnxfsPDFmMdRK X-Proofpoint-GUID: WHyL5aQXTySzeQ11X6pGnxfsPDFmMdRK X-Authority-Analysis: v=2.4 cv=OYkNnRTY c=1 sm=1 tr=0 ts=6ac62f2a cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=EUspDBNiAAAA:8 a=OuqQISpc-kSra7OiYdkA:9 a=0bXxn9q0MV6snEgNplNhOjQmxlI=:19 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-07_04,2026-10-06_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2610070046 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Platforms that use #address-cells = <2> on the fastrpc node encode the context bank number in cell[1] of the reg property rather than cell[0]. Reading cell[0] on such platforms yields 0 for every context bank, causing all sessions to share SID 0 and corrupting IOVA address construction. Use of_property_read_u32_index() with of_n_addr_cells() - 1 as the index so the correct cell is read regardless of the parent address cell width. Signed-off-by: Vinayak Katoch --- drivers/misc/fastrpc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index b29c1fd00de2..5c7bb56cf46d 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -2348,7 +2348,8 @@ static int fastrpc_cb_init(struct platform_device *pdev) if (!cctx) return -EINVAL; - if (of_property_read_u32(dev->of_node, "reg", &sid)) + if (of_property_read_u32_index(dev->of_node, "reg", + of_n_addr_cells(dev->of_node) - 1, &sid)) dev_info(dev, "FastRPC Session ID not specified in DT\n"); spin_lock_irqsave(&cctx->lock, flags); -- 2.34.1