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Thu, 9 Jan 2020 06:37:09 -0500 (EST) Date: Thu, 9 Jan 2020 12:37:08 +0100 From: Greg KH To: Muni Sekhar Subject: Re: read the memory mapped address - pcie - kernel hangs Message-ID: <20200109113708.GA362921@kroah.com> References: <20200108194503.GA2555481@kroah.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Cc: kernelnewbies X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kernelnewbies-bounces@kernelnewbies.org T24gVGh1LCBKYW4gMDksIDIwMjAgYXQgMDQ6NDQ6MTZQTSArMDUzMCwgTXVuaSBTZWtoYXIgd3Jv dGU6Cj4gT24gVGh1LCBKYW4gOSwgMjAyMCBhdCAxOjE1IEFNIEdyZWcgS0ggPGdyZWdAa3JvYWgu Y29tPiB3cm90ZToKPiA+Cj4gPiBPbiBUaHUsIEphbiAwOSwgMjAyMCBhdCAxMjozMDoyMEFNICsw NTMwLCBNdW5pIFNla2hhciB3cm90ZToKPiA+ID4gSGkgQWxsLAo+ID4gPgo+ID4gPiBJIGhhdmUg bW9kdWxlIHdpdGggWGlsaW54IEZQR0EuIEl0IGltcGxlbWVudHMgVUFSVChzKSwgU1BJKHMpLAo+ ID4gPiBwYXJhbGxlbCBJL08gYW5kIGludGVyZmFjZXMgdGhlbSB0byB0aGUgSG9zdCBDUFUgdmlh IFBDSSBFeHByZXNzIGJ1cy4KPiA+ID4gSSBzZWUgdGhhdCBteSBzeXN0ZW0gZnJlZXplcyB3aXRo b3V0IGNhcHR1cmluZyB0aGUgY3Jhc2ggZHVtcCBmb3IgY2VydGFpbiB0ZXN0cy4KPiA+ID4gSSBk ZWJ1Z2dlZCB0aGlzIGlzc3VlIGFuZCBpdCB3YXMgdHJhY2tlZCBkb3duIHRvIHRoZSDigJhyZWFk bCgp4oCZIGluCj4gPiA+IGludGVycnVwdCBoYW5kbGVyIGNvZGUKPiA+ID4KPiA+ID4gSW4gSVNS LCBmaXJzdCByZWFkcyB0aGUgSW50ZXJydXB0IFN0YXR1cyByZWdpc3RlciB1c2luZyDigJhyZWFk bCgp4oCZIGFzCj4gPiA+IGdpdmVuIGJlbG93Lgo+ID4gPiAgICAgc3RhdHVzID0gcmVhZGwoY3Ry bC0+cmVnICsgSU5UX1NUQVRVUyk7Cj4gPiA+Cj4gPiA+IEFuZCB0aGVuIGNsZWFycyB0aGUgcGVu ZGluZyBpbnRlcnJ1cHRzIHVzaW5nIOKAmHdyaXRlbCgp4oCZIGFzIGdpdmVuIGJsb3cuCj4gPiA+ ICAgICAgICAgd3JpdGVsKHN0YXR1cywgY3RybC0+cmVnICsgSU5UX1NUQVRVUyk7Cj4gPiA+Cj4g PiA+IEkndmUgbm90aWNlZCBhIGtlcm5lbCBoYW5nIGlmIElOVF9TVEFUVVMgcmVnaXN0ZXIgcmVh ZCBhZ2FpbiBhZnRlcgo+ID4gPiBjbGVhcmluZyB0aGUgcGVuZGluZyBpbnRlcnJ1cHRzLgo+ID4K PiA+IFdoeSB3b3VsZCB5b3UgcmVhZCB0aGF0IHJlZ2lzdGVyIGFnYWluIGFmdGVyIHdyaXRpbmcg dG8gaXQ/Cj4gPgo+ID4gQW5kIGFyZSB5b3Ugc3VyZSB5b3UgYXJlIHJlYWRpbmcvd3JpdGluZyB0 aGUgY29ycmVjdCBzaXplIG9mIHRoZSBpcnEKPiA+IGZpZWxkPyAgSSB0aG91Z2h0IGl0IHdhcyBh ICJ3b3JkIiBub3QgImxvbmciPyAgQnV0IHRoYXQgbWlnaHQgZGVwZW5kIG9uCj4gPiB5b3VyIGhh cmR3YXJlLCBkbyB5b3UgaGF2ZSBhIHBvaW50ZXIgdG8gdGhlIGtlcm5lbCBkcml2ZXIgc291cmNl IHlvdSBhcmUKPiA+IHVzaW5nIGZvciBhbGwgb2YgdGhpcz8KPiBBY3R1YWxseSBubyBuZWVkIHRv IHJlYWQgdGhhdCByZWdpc3RlciBhZ2Fpbi4gQnV0IHJlYWRpbmcgdGhhdAo+IHJlZ2lzdGVyIGFn YWluIHNob3VsZCBub3QgZnJlZXplIHRoZSBzeXN0ZW0sIHJpZ2h0PwoKSXQgbWlnaHQsIGRlcGVu ZHMgb24geW91ciBoYXJkd2FyZS4gIEdvIHRhbGsgdG8gdGhlIGhhcmR3YXJlIHZlbmRvciBpZgp5 b3UgaGF2ZSBxdWVzdGlvbnMgYWJvdXQgdGhpcy4KCj4gSU5UX1NUQVRVUyByZWdpc3RlciBpcyAz Mi1iaXQgd2lkdGgsIHNvIHJlYWRsKCkgQVBJIGlzIHVzZWQobXkgc3lzdGVtCj4gaXMgeDg2XzY0 LCBJbnRlbChSKSBBdG9tKFRNKSBDUFUpLiBJbnN0ZWFkIG9mIHJlYWRsKCksIGRvIEkgbmVlZCB0 bwo+IHVzZSByZWFkdygpIHR3aWNlPyBJZiBzbyB3aGF0IGlzIHJlYXNvbiBmb3IgdGhpcyBjb2Rl IGNoYW5nZT8KCk9rLCBpZiB0aGF0IHJlZ2lzdGVyIGlzIDMyIGJpdHMsIHRoYXQncyBmaW5lLiAg SXQgYWxsIGRlcGVuZHMgb24geW91cgpoYXJkd2FyZS4KCj4gSeKAmW0gdHJ5aW5nIHRvIHVuZGVy c3RhbmQgd2h5IHN5c3RlbSBmcmVlemVzIHdpdGhvdXQgYW55IGNyYXNoIGR1bXAKPiB3aGlsZSBy ZWFkaW5nIHRoZSBtZW1vcnkgbWFwcGVkIElPIGZyb20gaW50ZXJydXB0IGNvbnRleHQ/CgpCZWNh dXNlIHlvdXIgaGFyZHdhcmUgbG9ja2VkIHRoaW5ncyB1cD8KCj4gRlBHQSBjb2RlIG1pZ2h0IGJl IGJ1Z2d5LCBpdCBtYXkgbm90IHNlbmQgdGhlIGNvbXBsZXRpb24gZm9yIE1lbW9yeQo+IFJlYWQg cmVxdWVzdC4gQnV0IENQVSBzaG91bGQgbm90IGdldCBzdHVjayBhdCBMT0FEIGluc3RydWN0aW9u IGxldmVsLi4KClBDSSBoYXJkd2FyZSBjYW4gZG8gbG90cyBvZiBiYWQgdGhpbmdzIHRvIGEgc3lz dGVtLCBpdCBfSVNfIHBhcnQgb2YgdGhlCm1lbW9yeSBidXMsIHJpZ2h0PyAgU28gb2YgY291cnNl IGl0IGNhbiBsb2NrIHRoZSBDUFUgYXQgYSByZWFkLgoKPiBXaGVuIGl0IGh1bmcsIGl0IGRvZXMg bm90IGV2ZW4gcmVzcG9uZCBmb3IgU1lTUlEgYnV0dG9uKFNZU1JRIGlzCj4gZW5hYmxlZCDigJMg aW4gbm9ybWFsIHNjZW5hcmlvIGl0IHdvcmtzKSwgb25seSB3YXkgdG8gcmVjb3ZlciBpcyByZWJv b3QKPiB0aGUgc3lzdGVtLiBJIGVuYWJsZWQgYWxtb3N0IGFsbCB0aGUga2VybmVsLnBhbmljKiB2 YXJpYWJsZXMuIEkgc2V0Cj4gdGhlIGtlcm5lbC5wYW5pYyB0byBwb3NpdGl2ZSwgc28gaXQgc2hv dWxkIHJlYm9vdCBhZnRlciBwYW5pYyBpbnN0ZWFkCj4gb2YganVzdCBoYW5nLiBCdXQgaXTigJlz IG5vdCByZWJvb3RpbmcgYnkgaXRzZWxmLiBFdmVuICdwc3RvcmVccmFtb29wc+KAmQo+IGFsc28g bm90IGhlbHBlZC4KPiBBZnRlciByZWJvb3QgSSBsb29rZWQgYXQgdGhlIGtlcm4ubG9nIGFuZCBt b3N0IG9mIHRoZSB0aW1lcyBpdCBoYXMKPiDigJxeQF5AXkBeIC4uLuKAnCBsaW5lIGp1c3QgYmVm b3JlIHJlYm9vdC4KPiAKPiBPa2F5LCBJIHdpbGwgd3JpdGUgdGhlIG1pbmltYWxpc3RpYyBjb2Rl IHRvIHJlcHJvZHVjZSB0aGlzIG9uZSBhbmQKPiB0aGVuIHNoYXJlIHdpdGggeW91IGd1eXMuCgpX aGF0J3Mgd3Jvbmcgd2l0aCB0aGUgcmVhbC9mdWxsIGRyaXZlciBzb3VyY2U/CgpBbmQgYWdhaW4s IHdoeSBhcmUgeW91IHRyeWluZyB0byByZWFkIHRoZSByZWdpc3RlciB0d2ljZT8KCnRoYW5rcywK CmdyZWcgay1oCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpLZXJuZWxuZXdiaWVzIG1haWxpbmcgbGlzdApLZXJuZWxuZXdiaWVzQGtlcm5lbG5ld2JpZXMu b3JnCmh0dHBzOi8vbGlzdHMua2VybmVsbmV3Ymllcy5vcmcvbWFpbG1hbi9saXN0aW5mby9rZXJu ZWxuZXdiaWVzCg==