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Commit 230d3eff authored by Praveen Kurapati's avatar Praveen Kurapati
Browse files

msm: ipa3: Add change to avoid negative index access 



During caching of bw reg dereg, there is a chance to access
negative index values of cache. Add changes to overcome it.

Change-Id: I646aa3c35cd5a49e46334a3b09e610448779f72a
Signed-off-by: default avatarPraveen Kurapati <pkurapat@codeaurora.org>
parent 65bda98d

drivers/platform/msm/ipa/ipa_v3/ipa_mpm.c

+6 −4
Original line number Diff line number Diff line
@@ -3535,8 +3535,9 @@ int ipa3_qmi_reg_dereg_for_bw(bool bw_reg, int bw_reg_dereg_type) 
			}

			IPA_MPM_DBG("QMI BW regst success from %d",

				ipa_mpm_ctx->bw_reg_dereg_cache[

					ipa_mpm_ctx->cache_index -

					1].bw_reg_dereg_type);

					(ipa_mpm_ctx->cache_index -

					1) % IPA_MAX_BW_REG_DEREG_CACHE].

					bw_reg_dereg_type);

		} else {

			IPA_MPM_DBG("bw_change to %d no-op, teth_count = %d",

				bw_reg,
@@ -3557,8 +3558,9 @@ int ipa3_qmi_reg_dereg_for_bw(bool bw_reg, int bw_reg_dereg_type) 
			}

			IPA_MPM_DBG("QMI BW De-regst success %d",

				ipa_mpm_ctx->bw_reg_dereg_cache[

					ipa_mpm_ctx->cache_index -

					1].bw_reg_dereg_type);

					(ipa_mpm_ctx->cache_index -

					1) % IPA_MAX_BW_REG_DEREG_CACHE].

					bw_reg_dereg_type);

		} else {

			IPA_MPM_DBG("bw_change to %d no-op, teth_count = %d",

				bw_reg,